Stoichiometry Mole to Mass

What is the molar mass for oxygen gas (O₂)?

• 16 g/mol

• 32 g/mol

• 14 g/mol

• 15.999g/mol

What is the conversion factor between mole and grams?

• 1 mole = 6.022 x 10²³ grams

• 1 gram of the substance = molar mass of the substance

• 1 atom = 6.022 x 10²³ moles

• 1 mole = 6.022 x 10²³ atoms/particles

What is the molar ratio between oxygen and carbon dioxide?

• 2 C₂H₂ + 5 O₂ -> 4 CO₂ + 2 H₂O

• 10 mol O₂ : 8 mol CO₂

• 5 mol O₂ : 4 mol CO₂

• 1 mol O₂ : 2 mol H₂O

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

What is the molar ratio between sodium hydroxide and hydrogen? 2 Na + 2 H₂O -> 2 NaOH + H₂

• 1 mol NaOH : 1 mol H₂

• 2 mol NaOH : 1 mol H₂

• 1 mol Na : 1 mol H₂

• 2 mol Na : 1 mol H₂

Tags

NGSS.HS-PS1-7

What mass of NaCl can be produced from 0.75 mol of chlorine gas (Cl2)?

• 0.75 g

• 1.5 g

• 44 g

• 88 g

Tags

NGSS.HS-PS1-7

What mass of carbon dioxide (CO2) can be produced from 25.0 g of calcium carbonate (CaCO3)?

• 25.0 g

• 11.0 g

• 22.0 g

• 56.0 g

Tags

NGSS.HS-PS1-7

In stoichiometry, chemists are mainly concerned with

• mole and mass relationships in chemical reactions.

• the types of bonds found in compounds.

• energy relationships in chemical reactions.

• the speed with which chemical reactions occur.

Tags

NGSS.HS-PS1-7

In the reaction pictured, how many moles of hydrogen will be formed when 4 mol of HCl are consumed?

• 6

• 4

• 2

• 8

Tags

NGSS.HS-PS1-7

For the reaction pictured how many moles of nitrogen gas (N2) are required to produce 18 mol of ammonia (NH3)?

• 18

• 9.0

• 4.5

• 36

Tags

NGSS.HS-PS1-7

If given the mass of methane (CH4) what can be calculated based on the balanced reaction below?

• The mass of the oxygen gas reacting along with the mass of carbon dioxide and water produced.

• Only the mass of carbon dioxide produced.

• Only the mass of oxygen gas reacting.

• Only the mass of ,carbon dioxide and water produced.

Tags

NGSS.HS-PS1-7